Folder Passcode allows you to set security codes for folders in iOS

  Passcode folder is a tweak released during this night in Cydia, and with its help you can protect iOS folders with a security code. The tweak was developed by the person who brought it to us Icon Passcode and it is based on a similar system. In the settings menu of the Settings application, you can choose the security code that must be entered when opening the folders and probably the folders that are protected, so that no one will be able to open a folder in which you have important/personal things.

The most popular request when the amazing free tweak Icon Passcode got released. What you have been waiting for is here! This is an AMAZING free tweak. Folder Passcode lets you lock any folder you like, For instructions on how to use is in the settings (click on "how this tweak works button" to see detailed instructions. this was a much better way to try and explain to everyone how it works ! Ive been working on this today to make it the perfect password protection via folders. making this all look like its apart of the IOS. when entering the settings on your first install, you will be prompted to set your passcode.

  The Passcode folder is available for free in Cydia's ModMyi repo and theoretically works on any jailbroken iDevice.